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Finding the Fourth Proportional to 28,074.87, 42,075.95 and 11,415.42

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Solution

The fourth proportional to 28,074.87, 42,075.95 and 11,415.42 is: 17,108.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,074.87 : 42,075.95 = 11,415.42 : x
  2. Step 2: Convert to fraction form
    28,074.87/42,075.95 = 11,415.42/x
  3. Step 3: Cross multiply
    28,074.87x = 42,075.95 × 11,415.42
  4. Step 4: Simplify right side
    28,074.87x = 480,314,584.07
  5. Step 5: Solve for x
    x = 480,314,584.07/28,074.87
  6. Step 6: Final answer
    x = 17,108.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.